<template>
  <div>
    <!-- 面包屑导航区域-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>用户管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域-->
    <el-card>
      <!-- 搜索与添加区域-->
      <el-row :gutter="20">
        <!-- 搜索区域-->
        <el-col :span="8">
          <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getUserList">
            <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
          </el-input>
        </el-col>
        <!-- 添加区域-->
        <el-col :span="4">
          <el-button @click="addDialogVisible = true" type="primary">添加用户</el-button>
        </el-col>
      </el-row>
      <!-- 用户列表区域-->
      <!-- 使用:data指定数据源-->
      <el-table :data="userlist" :border="true" :stripe="true">
        <!-- prop指定值，label指定显示什么-->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="姓名" prop="username"></el-table-column>
        <el-table-column label="邮箱" prop="email"></el-table-column>
        <el-table-column label="电话" prop="mobile"></el-table-column>
        <el-table-column label="角色" prop="role_name"></el-table-column>
        <el-table-column label="状态">
          <template slot-scope="scope">
            <el-switch v-model="scope.row.mg_state" @change="userStateChanged(scope.row)">
            </el-switch>
          </template>
        </el-table-column>
        <el-table-column label="操作" width="#">
          <template slot-scope="scope">
            <!-- 修改按钮-->
            <el-button @click="showEditDialog(scope.row.id)" type="primary" icon="el-icon-edit" size="mini"></el-button>
            <!-- 删除按钮-->
            <el-button @click="removeUserById(scope.row.id)" type="danger" icon="el-icon-delete" size="mini"></el-button>
            <!-- 分配角色按钮：带提示-->
            <el-tooltip effect="dark" content="分配角色" placement="top" :enterable="false">
              <el-button @click="setRole(scope.row)" type="warning" icon="el-icon-setting" size="mini"></el-button>
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>
      <!-- 分页区域-->
      <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="queryInfo.pagenum"
          :page-sizes="[1, 2, 5, 10]"
          :page-size="queryInfo.pagesize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total">
      </el-pagination>
    </el-card>

    <!-- 添加用户的对话框-->
    <el-dialog @close="addDialogClosed"
        title="添加用户"
        :visible.sync="addDialogVisible"
        width="50%">
      <!-- 内容主题区域-->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
        <el-form-item label="用户名" prop="username">
          <el-input v-model="addForm.username"></el-input>
        </el-form-item>
        <el-form-item label="密码" prop="password">
          <el-input v-model="addForm.password"></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="addForm.email"></el-input>
        </el-form-item>
        <el-form-item label="手机" prop="mobile">
          <el-input v-model="addForm.mobile"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域-->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改用户的对话框-->
    <el-dialog
        title="修改用户"
        :visible.sync="editDialogVisible"
        width="50%" @close="editDialogClosed">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
        <el-form-item label="用户名">
          <el-input v-model="editForm.username" disabled></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="editForm.email"></el-input>
        </el-form-item>
        <el-form-item label="手机" prop="mobile">
          <el-input v-model="editForm.mobile"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配角色对话框-->
    <el-dialog
        title="分配角色"
        :visible.sync="setRoleDialogVisible"
        width="50%" @close="setRoleDialogClosed">
      <div>
        <p>当前的用户：{{userInfo.username}}</p>
        <p>当前的角色：{{userInfo.role_name}}</p>
        <p>
          分配新角色：
          <el-select v-model="selectedRoleId" placeholder="请选择">
            <el-option
                v-for="item in rolesList"
                :key="item.id"
                :label="item.roleName"
                :value="item.id">
            </el-option>
          </el-select>
        </p>
      </div>
      <span slot="footer" class="dialog-footer">
    <el-button @click="setRoleDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
  </span>
    </el-dialog>

  </div>
</template>

<script>
export default {
  name: "Users",
  data(){
    // 验证邮箱的规则，写在return之前
    var checkEmail = (rule,value,callback) => {
      // 验证邮箱的正则表达式
      const regEmail = /^\w+@\w+(\.\w+)+$/
      if (regEmail.test(value)){
        // 邮箱合法
        return callback()
      }
      // 邮箱不合法
      callback(new Error('请输入合法的邮箱'))
    }
    // 验证手机号的规则
    var checkMobile = (rule,value,callback) => {
      // 验证手机号的正则表达式
      const regMobile = /^1[34578]\d{9}$/
      if (regMobile.test(value)){
        // 验证通过，手机合法
        return callback()
      }
      // 手机号不合法
      callback(new Error('请输入合法的手机号'))
    }
    return {
      // 获取用户列表的参数对象
      queryInfo:{
        query:'',
        // 当前的页数
        pagenum:1,
        // 当前每页显示多少条数据
        pagesize:2
      },
      userlist:[],
      total:0,
      // 添加用户对话框的显示与隐藏
      addDialogVisible: false,
      // 编辑用户对话框的显示与隐藏
      editDialogVisible: false,
      // 添加用户的表单数据
      addForm:{
        username: '',
        password: '',
        email:'',
        mobile:''
      },
      // 添加表单的验证规则对象
      addFormRules:{
        username:[{
          required: true,
          message: '请输入用户名',
          trigger: 'blur'
        },{
          min: 3,
          max: 10,
          message: '用户名的长度在3~10个字符之间',
          trigger: 'blur'
        }],
        password:[{
          required: true,
          message: '请输入密码',
          trigger: 'blur'
        },{
          min: 6,
          max: 15,
          message: '密码的长度在6~15个字符之间',
          trigger: 'blur'
        }],
        email:[{
          required: true,
          message: '请输入邮箱',
          trigger: 'blur'
        },{
          validator: checkEmail,
          trigger: 'blur'
        }],
        mobile:[{
          required: true,
          message: '请输入手机号',
          trigger: 'blur'
        },{
          validator: checkMobile,
          trigger: 'blur'
        }],
      },
      // 查询到的用户信息
      editForm:{},
      // 修改表单的验证规则
      editFormRules:{
        email:[{
          required: true,
          message: '请输入邮箱',
          trigger: 'blur'
        },{
          validator: checkEmail,
          trigger: 'blur'
        }],
        mobile:[{
          required: true,
          message: '请输入手机号',
          trigger: 'blur'
        },{
          validator: checkMobile,
          trigger: 'blur'
        }],
      },
      // 控制分配角色对话框的显示与隐藏
      setRoleDialogVisible: false,
      // 需要被分配角色的用户信息
      userInfo:{},
      // 所有角色的数据列表
      rolesList:[],
      // 已选中的角色ID值
      selectedRoleId:''
    }
  },
  created() {
    this.getUserList()
  },
  methods:{
    async getUserList(){
      const {data:res} = await this.$http.get('users', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) return this.$message.error("获取用户失败！")
      this.userlist = res.data.users
      this.total = res.data.total
    },
    // 监听pagesize改变的事件
    handleSizeChange(newSize){
      this.queryInfo.pagesize = newSize
      this.getUserList()
    },
    // 监听页码值的改变
    handleCurrentChange(newPage){
      this.queryInfo.pagenum = newPage
      this.getUserList()
    },
    // 监听switch状态开关的改变
    async userStateChanged(userinfo){
      const {data: res} = await this.$http.put(`users/${userinfo.id}/state/${userinfo.mg_state}`)
      if (res.meta.status !== 200) {
        userinfo.mg_state = !userinfo.mg_state
        return this.$message.error('更新用户状态失败！')
      }
      this.$message.success('更新用户状态成功！')

    },
    // 监听添加用户对话框的关闭
    addDialogClosed(){
      this.$refs.addFormRef.resetFields()
    },
    // 点击按钮，添加新用户
    addUser(){
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        // 可以发起添加用户的网络请求
        const {data:res} = await this.$http.post('users',this.addForm)
        if (res.meta.status !== 201) {
          return this.$message.error('添加用户失败！')
        }
        this.$message.success('添加用户成功！')
        // 隐藏添加用户的对话框
        this.addDialogVisible = false
        // 重新获取用户列表数据
        this.getUserList()
      })
    },
    // 显示编辑用户的对话框
    async showEditDialog(id){
      const {data:res} = await this.$http.get('users/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败！')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改用户对话框的关闭
    editDialogClosed(){
      this.$refs.editFormRef.resetFields()
    },
    // 修改用户信息并提交
    editUserInfo(){
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // 发起修改用户信息的数据请求
        const {data:res} = await this.$http.put('users/' + this.editForm.id, {
          email: this.editForm.email,
          mobile: this.editForm.mobile
        })
        // 判断是否成功
        if (res.meta.status !== 200) {
          return this.$message.error('更新用户信息失败！')
        }
        // 成功之后, 1: 关闭对话框
        this.editDialogVisible = false
        // 2. 刷新数据列表
        this.getUserList()
        // 3. 提示修改信息成功
        this.$message.success('更新用户信息成功！')
      })
    },
    // 删除用户
    async removeUserById (id){
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
        // 捕获所有报错，并直接return，下行箭头函数省略了return
      }).catch(err => err)
      // 这时，如果用户确认删除，返回得字符串为confirm
      // 如果用户取消删除，返回的字符串为cancel
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      // 调用接口，真正发起请求
      const {data:res} = await this.$http.delete('users/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败！')
      }
      this.$message.success('删除用户成功！')
      this.getUserList()
    },
    // 展示分配角色的对话框
    async setRole(userInfo){
      this.userInfo = userInfo
      // 在展示对话框之前，获取所有角色的列表
      const {data:res} = await this.$http.get('roles')
      if (res.meta.status !== 200){
        return this.$message.error('获取角色列表失败')
      }
      // 获取成功后
      this.rolesList = res.data
      this.setRoleDialogVisible = true
    },
    // 点击确定按钮，完成角色分配
    async saveRoleInfo(){
      if(!this.selectedRoleId){
        return this.$message.error('请选择要分配的角色！')
      }
      const {data:res} = await this.$http.put(`users/${this.userInfo.id}/role`,{
        rid: this.selectedRoleId
      })
      if (res.meta.status !== 200){
        return this.$message.error('更新角色失败！')
      }
      this.$message.success('更新角色成功！')
      this.getUserList()
      this.setRoleDialogVisible = false
    },
    // 监听分配角色对话框的关闭
    setRoleDialogClosed(){
      this.selectedRoleId = ''
      this.userInfo = {}
    }
  }
}
</script>

<style lang="less" scoped>

</style>